Reversible switching of tetra-tert-butyl-azobenzene on a Au(111) surface induced by light and thermal activation

被引：108

作者：

Hagen, Sebastian ^{[1
]}

Leyssner, Felix ^{[1
]}

Nandi, Dhananjay ^{[1
]}

Wolf, Martin ^{[1
]}

Tegeder, Petra ^{[1
]}

机构：

[1] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 444卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2007.07.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two-photon photoemission spectroscopy is employed to analyze reversible changes in the electronic structure of the molecular switch tetra-tert-butyl-azobenzene (TBA) adsorbed on Au(111), which are induced by UV-light and thermal activation. Cycles of illumination and annealing steps confirm the reversibility of the switching process, which we assign to a trans/cis-isomerization of TBA molecules in direct contact with the Au(1 11) surface. Pronounced changes in the photoelectron spectra due to UV-light exposure allow to calculate an effective cross section of sigma(eff) approximate to 8 x 10(-22) cm(-2) at. 4.14 eV and sigma(eff) approximate to 4 x 10(-21) cm(-2) at 4.4 eV, respectively, for the trans- to cis-isomerization. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：85 / 90

页数：6

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